Terminal, base station, and communication method

Abstract

This terminal comprises: a receiving circuit which receives control information including information regarding a timing of a frequency resource for performing reception processing, among a plurality of frequency resources used for the frequency-multiplexed transmission of a plurality of downlink signals; and a control circuit which controls the reception processing on the basis of the control information.

1 . A terminal, comprising:
 reception circuitry, which, in operation, receives a control signal; and   control circuitry, which, in operation, controls a transmission method of a response signal to reception of the control signal, based on a buffer status of data satisfying a predetermined requirement.   
     
     
         2 . The terminal according to  claim 1 , wherein
 the requirement is a requirement related to a latency for the data.   
     
     
         3 . The terminal according to  claim 1 , wherein
 the requirement is based on a traffic indicator, an access category, or a time up until the data is discarded.   
     
     
         4 . The terminal according to  claim 1 , wherein
 the requirement is indicated in a user information field of the control signal.   
     
     
         5 . The terminal according to  claim 3 , wherein
 the control circuit makes a frequency resource used for transmission of the response signal different between transmission data with a high requirement and transmission data with a low requirement.   
     
     
         6 . The terminal according to  claim 5 , wherein
 a location of the frequency resource for the transmission data with the high requirement is indicated in a user information field of the control signal.   
     
     
         7 . The terminal according to  claim 1 , wherein
 presence or absence of the requirement or a level of the requirement is indicated by a value of a feedback type subfield of a user information field of the control signal.   
     
     
         8 . The terminal according to  claim 1 , wherein
 the control circuit indicates, in the response signal, the requirement of the data held in a buffer, by using an orthogonal sequence pattern applied to a training signal of the response signal.   
     
     
         9 . The terminal according to  claim 8 , wherein
 the control circuit indicates the requirement in the response signal in a case where the number of symbols of the training signal is two and a value of a multiplex flag subfield of the control signal is 0.   
     
     
         10 . The terminal according to  claim 1 , wherein
 the control circuit indicates the requirement of the data held in a buffer, by using a frequency resource for transmission of the response signal.   
     
     
         11 . The terminal according to  claim 1 , wherein
 the control circuit indicates, in the response signal, the buffer status of the data satisfying the requirement in a case where the control signal is received within a second wakeup time in which data transmission is restricted in accordance with the requirement relative to a first wakeup time.   
     
     
         12 . The terminal according to  claim 11 , wherein
 the control circuit indicates, in the response signal, the buffer status of the data irrespective of the requirement in a case where the control signal is received within the first wakeup time.   
     
     
         13 . A base station, comprising:
 control circuitry, which, in operation, sets, in a control signal for triggering transmission of a response signal, information on a predetermined requirement with which a terminal controls a transmission method of the response signal based on a buffer status of data satisfying the requirement; and   transmission circuitry, which, in operation, transmits the control signal to the terminal.   
     
     
         14 . A communication method, comprising:
 receiving, by a terminal, a control signal; and   controlling, by the terminal, a transmission method of a response signal to reception of the control signal, based on a buffer status of data satisfying a predetermined requirement.